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Equipment Discussions >> Reflectors

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gnowellsct
Postmaster
*****

Reged: 06/24/09

Alternative to collodion?
      #6108288 - 09/29/13 09:59 PM

check it out

Collodion has long been a mirror cleaning technique that has had a following. But it is dangerously flammable stuff and a bottle costs something like $60.

Seeing this video, I wondered if the ultimate Newt cleaning technique had arrived.

Greg N


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msalganik
super member
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Reged: 01/28/07

Loc: Durham, NC
Re: Alternative to collodion? new [Re: gnowellsct]
      #6109540 - 09/30/13 04:08 PM

Now that looks cute. The question that immediately jumps to mind is does it leave any sort of oily residue?

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David Castillo
Carpal Tunnel
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Reged: 09/09/06

Loc: Carmel Valley, Ca
Re: Alternative to collodion? new [Re: msalganik]
      #6109802 - 09/30/13 06:49 PM

There is a product already on the market made by Photonic: LOOK AT THIS
----
Dave


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gnowellsct
Postmaster
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Reged: 06/24/09

Re: Alternative to collodion? new [Re: David Castillo]
      #6110203 - 09/30/13 10:32 PM

Quote:

There is a product already on the market made by Photonic: LOOK AT THIS
----
Dave




I remember that Demo. Seemed to me the product was still pricey. I think that one would be well advised to start out slowly. First try a ceramic plate to see if there is in fact any kind of residue. Or maybe a cheap mirror. Then a cheap telescope mirror. Proceed by steps.

Greg N


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johnnyha
Postmaster
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Reged: 11/12/06

Loc: Sherman Oaks, CA
Re: Alternative to collodion? new [Re: gnowellsct]
      #6111248 - 10/01/13 01:45 PM Attachment (9 downloads)

The wood glue/album technique is interesting, I wish I had a cheap mirror to try some Elmer's Glue. Anyone game?

I did the collodion technique once and it worked very well but man is it stinky. I put some on a 15" mirror and gently draped cheesecloth (actually it was some medical cotton stuff like cheesecloth I got at the pharmacy) over it. Within about 45 minutes the cheesecloth had curled up and shrank, taking the collodion with it, and it pretty much just fell off with no peeling, leaving an almost perfectly clean mirror. There were a few little bits of residue. But it's so much easier and quicker and cleaner to use the sink technique that I do that now about twice a year.


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johnnyha
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Reged: 11/12/06

Loc: Sherman Oaks, CA
Re: Alternative to collodion? new [Re: johnnyha]
      #6111277 - 10/01/13 01:55 PM Attachment (9 downloads)

The couple of spots where there was still a bit of collodion (and a couple fingerprints, d'oh!) were easily removed, leaving a perfectly clean shiny mirror. If I had been more careful I think I could have avoided this step but it worked really well. As a spot remover for say bird poop and fingerprints, colloidon is perfect and easy, leaving no trace.

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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: Alternative to collodion? new [Re: gnowellsct]
      #6111770 - 10/01/13 07:09 PM

Quote:

Quote:

There is a product already on the market made by Photonic: LOOK AT THIS
----
Dave




I remember that Demo. Seemed to me the product was still pricey. I think that one would be well advised to start out slowly. First try a ceramic plate to see if there is in fact any kind of residue. Or maybe a cheap mirror. Then a cheap telescope mirror. Proceed by steps.

Greg N



Used it. Never could get all the stuff off as easily as they said.
A friend who makes and tests mirrors tried it and found it didn't clean well enough to restore reflectivity.
So it's snake oil, I'm afraid. Caveat emptor.
Ditto colodion. Gets the dust, but not the haze.

This is what works, works well, doesn't damage the mirror, and is cheap-cheap-cheap: http://www.youtube.com/watch?v=9Y8xFnXFVGQ


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Seldom
scholastic sledgehammer


Reged: 08/05/12

Loc: N of Cedar City Light Dome
Re: Alternative to collodion? new [Re: Starman1]
      #6112935 - 10/02/13 11:17 AM

This is another way to care for primaries.

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Starman1
Vendor (EyepiecesEtc.com)
*****

Reged: 06/24/03

Loc: Los Angeles
Re: Alternative to collodion? new [Re: Seldom]
      #6113186 - 10/02/13 01:41 PM

Y'all might like reading this article:
http://adsabs.harvard.edu/full/1997PASP..109..303M


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hbanich
Pooh-Bah
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Reged: 06/17/05

Loc: Portland, Oregon
Re: Alternative to collodion? new [Re: Starman1]
      #6113444 - 10/02/13 04:04 PM

Quote:

Y'all might like reading this article:
http://adsabs.harvard.edu/full/1997PASP..109..303M




That's a great read - and I'll be washing my mirrors more often now.


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